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ARM: kprobes: Reject probing of SETEND instructions 

The emulation of SETEND was broken as it changed the endianess for
the running kprobes handling code. Rather than adding a new simulation
routine to fix this we'll just reject probing of SETEND as these should
be very rare in the kernel.

Note, the function emulate_none is now unused but it is left in the
source code as future patches will use it.

Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
This commit is contained in:
Jon Medhurst 2011-04-18 08:53:56 +01:00 committed by Nicolas Pitre
parent ac211c6994
commit f0aeb8bff0
1 changed files with 0 additions and 5 deletions
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5
arch/arm/kernel/kprobes-decode.c
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@ -956,11 +956,6 @@ space_1111(kprobe_opcode_t insn, struct arch_specific_insn *asi)
}
/* SETEND : 1111 0001 0000 0001 xxxx xxxx 0000 xxxx */
if ((insn & 0xffff00f0) == 0xf1010000) {
asi->insn[0] = insn;
asi->insn_handler = emulate_none;
return INSN_GOOD;
}
/* Coprocessor instructions... */
/* MCRR2 : 1111 1100 0100 xxxx xxxx xxxx xxxx xxxx : (Rd != Rn) */